1. You may mean 1.2 AMPS, not ma, plate current. However, DC input power of
1.2 amps plate current at 2800 V is 3.36 kw, not 2.45 kw.
2. I don't think 45% efficiency is bad for an AB2 amplifer at 50 MHz.
3. Operating parameters are a function of tube design, and so are "individual"
for the tube and application. They are chosen to achieve a desired load,
efficiency and distortion level.
Gene May WB8WKU
>
> Today's Topics:
>
> 1. . . . . .
> 2. . . . . .
> 3. . . . . . . ..
> 4. mfj 259 (Carey Lockhart)
> 5. . . . .
> 6. . . . . . . . .
>
> ----------------------------------------------------------------------
>
> Message: 4
> Date: Fri, 9 Sep 2011 06:25:10 -0500
> From: Carey Lockhart <kc5gtt@gmail.com>
> Subject: [Amps] mfj 259
> To: amps@contesting.com
> Message-ID: <156B59D5-C81D-4473-BAE3-8C8ADF4E161B@gmail.com>
> Content-Type: text/plain; charset=us-ascii
>
> good morning guys,
>
> i have a 6 meter project going with a gs-35. i would like to use my mfj259 on
> the anode and cathode. i have read all i can find as usual but still don't
> understand how they come up with the beginning operating parameters. really
> the only known one i have is plate voltage of 2800v.
>
> my current output is:
>
> 2450 full load
> 80w drive
> 1.2ma plate
> 126ma grid
> 1000 out
>
> this does not seem to be right nor very efficient. since i have learned from
> yall how to calculate efficency my life has been hell. HIHI 30 to 45 percent
> just isn't enough.
>
> Carey, kc5gtt
>
> ------------------------------
>
> End of Amps Digest, Vol 105, Issue 6
> ************************************
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